DPFC Performance for Improvement of Power Quality in Power System Undergoing Unbalance Faulty Condition

A recently new proposed control structure for improvement for Power Quality in power-systems has introduced an extension for FACTS, known as Distributed Power Flow Controller. This device controls the system behavior under defective conditions by controlling series and parallel convertors associated with it. The DPFC is the modified version of Unified power Flow Controller (UPFC) by terminating its interconnection using dc-link capacitor. It applies the D-FACTS concepts in series control convertor and STATCOM like control in parallel convertor. The power transferring is bi-directional between two convertors with the help of X-mission line. The controlling capacity of DPFC is as same for UPFC and additionally it is much convenient and cheaper than UPFC. In this presented paper DPFC is used for mitigating power fluctuations during unbalance fault. The simulation model and its results are evaluated using MATLAB/SIMULINK and validates its ability for PQ improvement.